I just completed work on a science manuscript using Scrivener. I don’t see any problems using it for a research grant and some advantages. However, grant deadlines can be stressful and it is not a good time to be learning a new program. I would advise you to practice on something less important or to leave yourself plenty of time to fiddle with it.
An advantage of Scrivener is that you can import your data, figures, research articles and other bits of useful information as PDFs or other files into the Research section, where you can consult them while writing, using the split screen. (I see this as very useful for writing a grant, where I use lots of scattered information. ) You can drag and drop JPEGs too in the Research Folder and resize them conveniently in the split window. The bulletin board view is also a nice way to look at multiple figures. I could also copy and paste data from an Excel spreadsheet into a text file in the research section and so could look at raw data.
I composed a paper draft using the various subheadings of the introduction, results, materials and methods, and discussion as separate units. I merged them (after some rearrangements) and exported everything using the RTF export back into MS Word. I actually started the manuscript in MS Word and performed both an import from and export back to Word.
Other features that are useful: I used the Notes section to alert myself what other references need to be consulted or what data needed to be generated. The synopsis text I used to outline the idea or logic of each subsection. It is especially easy to reorder the sections using the bulletin board and see how the text reads in different orders. (This is even more of a problem in writing a grant.)
Here’s some problems:
formatting. I’m a geneticist and genes in my organism are indicated in italics. These get converted to underlines and I had to painstakingly find and replace them all (several hundred) in Word. Leave this kind of formatting for the final draft. Ditto for greek letters and other symbols.
References: I use Endnote and imported from Microsoft Word with some references already inserted in the program. It works fine to unformat these in Word–they end up in this format {Author, Date, Record#} before import. Scrivener doesn’t bother them, and then you can reformat the bibliography upon export to MS Word. I just used a placeholder (Name and data in parens) for each reference I inserted while I was composing in Scrivener, to be replaced by hand back in MS Word with Endnote. I tend to do this anyway with Endnote–waiting until the final drafts to insert the references–since the formatting slows down Word and can be buggy.
By the way, another very useful program for scientists is Papers, a database to organize and display PDFs. I import an Endnote file into Papers, link them to the PDFs by using PubMed seaches. The linked PDF can be dragged and dropped into the research folder of Scrivener. Papers has a full screen view that makes PDFs readable onscreen, a feature that would be nice in Scrivener.
Good luck. I think it’s a useful tool for science writers, especially for larger projects like grants.